Officials Say 63 Injured in Commuter Train Cars off Tracks Near Spuyten Duyvil Station on Hudson Line

NEW YORK—The engineer of a commuter train that derailed Sunday in New York City—killing four and injuring more than 60 others—didn't apply brakes as usual when approaching a tight curve where the speed limit drops abruptly from 70 mph to 30 mph, according to people familiar with the investigation.

The southbound Metro-North Railroad train was carrying about 150 passengers when it derailed around 7:20 a.m. in the Bronx, just north of Manhattan at an inlet where the Hudson and Harlem rivers meet. All seven passenger...